1. Technological Primates Research Group, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
2. Center for the Advanced Study of Human Paleobiology, Department of Anthropology, The George Washington University
3. Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
4. National Primate Research Center of Thailand, Chulalongkorn University, Saraburi, Thailand